santosrowan06 santosrowan06

01-02-2018
Mathematics

contestada

In seawater there is 5% of salt. How many liters of fresh water do you need to add to 30 liters of seawater to get a 1.5% solution of salt?

Respuesta :

zrh2sfo zrh2sfo

05-02-2018

Let x = amout of fresh water required
The amount of the salt remains the same
.05(30) = .015(x+30)
1.5 = .015x + .45

1.5 - .45 = .015x
1.05 = .015x
x = 1.05/.015
x = 70 liters of fresh water

check solution
.05(30) = .015(100)
1.5 = 1.5

Answer Link

Otras preguntas

Which of the following values for m proves that 2m + 2m is not equivalent to 4m2? m = 0 m = 1 m = 2

Explain some differences between traditional ( old ) and modern ( new ) farming methods

Lisa has 12 more stickers than John, and together they have 60 stickers. What is the ratio of the number of Lisa’s stickers to the number of John’s stickers? He

What is the advantage of adding more pulleys to a system of pulleys?

Thermal equilibrium is reached when______________. electrical forces are balanced the sound vibrations reach a high pitch two objects in contact with each other

Please help me find the area of each shaded segment and round the answer to the nearest tenth :)

For f(x) = ax^2 + bx + c, if f(1) = 5 and f(-1) = 0, find the value of a + c.

find the mean, median, and interquartile for the data set below. Round your answer to the nearest tenth. 27,16,8,5,19,14,22,31,13,5,23,16,8

What is the volume of the prism? Enter your answer in the box as a mixed number in simplest form.

10 hours to 6 hours percent of change